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CVE-2018-11776

Apache — Apache Struts Remote Code Execution Vulnerability

Apache · Remote code execution · in CISA KEV since 2021-11-03

KEV since 2021 · listed over a yearCISA KEVActively Exploited
85

EVRS 85 of 100 Immediate

Patch Immediately

Rank 363 of 2,960 tracked

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Why it scores 85

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.999.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

  • org.apache.struts:struts2-core2.3.352.5.17update to this version or later in your release line

Affected versions

  • org.apache.struts:struts2-core (maven)affected >= 2.0.4, <= 2.3.34, fixed in 2.3.35affected >= 2.5, <= 2.5.16, fixed in 2.5.17

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD and GitHub. Affected packages also in GitHub Advisory GHSA-cr6j-3jp9-rw65 (CC BY 4.0).

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 8.1 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.999 (99.99th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-05-03 · KEV since 2021 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 8.1 (v3.1), assigned by apache. Listed ENISA EUVD

Description

NVD

Apache Struts versions 2.3 to 2.3.34 and 2.5 to 2.5.16 suffer from possible Remote Code Execution when alwaysSelectFullNamespace is true (either by user or a plugin like Convention Plugin) and then: results are used with no namespace and in same time, its upper package have no or wildcard namespace and similar to results, same possibility when using url tag which doesn't have value and action set and in same time, its upper package have no or wildcard namespace.

What CISA says to do

Public module

Metasploit lists a public excellent-rank module for this CVE: Apache Struts 2 Namespace Redirect OGNL Injection (multi/http/struts2_namespace_ognl). A module existing is not the same as active exploitation; see metasploit.com.